> ## Documentation Index
> Fetch the complete documentation index at: https://hanabiaiinc-docs-concurrency-qpm-rate-limits.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# WebSocket TTS Streaming

> Real-time text-to-speech streaming via WebSocket

<Note>
  The WebSocket TTS endpoint enables bidirectional streaming for low-latency text-to-speech generation with MessagePack serialization.
</Note>

<Note>
  The `request` payload inside `StartEvent` uses the same parameters as the HTTP [Text to Speech API](/api-reference/endpoint/openapi-v1/text-to-speech). For more detailed field guidance, model-specific behavior, and examples, see that page. In WebSocket mode, `request.text` is typically empty in `StartEvent`, and the text content is sent through subsequent `TextEvent` messages.
</Note>